Fix upload-artifact threshold: v6.0.0 is approved (PRODSEC-126892)

Author: mraible

.github/dependabot.yml

@@ -30,4 +30,4 @@ updates:
       - dependency-name: "peter-evans/create-pull-request"
         versions: [">=8.0.0"]
       - dependency-name: "actions/upload-artifact"
-        versions: [">=6.0.0"]
+        versions: [">=7.0.0"]